[chore] Clean up CODEOWNERS (open-telemetry#23382)

**Description:** 

Clean up CODEOWNERS file to remove redundant lines; add these to the
ALLOWLIST.

**Link to tracking Issue:** mentioned on Zoom chat at the Collector SIG

.github/CODEOWNERS

@@ -43,7 +43,6 @@ exporter/awss3exporter/                                  @open-telemetry/collect
 exporter/awsxrayexporter/                                @open-telemetry/collector-contrib-approvers @wangzlei @srprash
 exporter/azuremonitorexporter/                           @open-telemetry/collector-contrib-approvers @pcwiese
 exporter/azuredataexplorerexporter/                      @open-telemetry/collector-contrib-approvers @asaharan @ag-ramachandran
-exporter/carbonexporter/                                 @open-telemetry/collector-contrib-approvers 
 exporter/clickhouseexporter/                             @open-telemetry/collector-contrib-approvers @hanjm @dmitryax @Frapschen
 exporter/cassandraexporter/                              @open-telemetry/collector-contrib-approvers @atoulme @emreyalvac
 exporter/coralogixexporter/                              @open-telemetry/collector-contrib-approvers @oded-dd @povilasv @matej-g
@@ -173,7 +172,6 @@ receiver/awsxrayreceiver/                                @open-telemetry/collect
 receiver/azureblobreceiver/                              @open-telemetry/collector-contrib-approvers @eedorenko @mx-psi
 receiver/azuremonitorreceiver/                           @open-telemetry/collector-contrib-approvers @altuner @codeboten
 receiver/bigipreceiver/                                  @open-telemetry/collector-contrib-approvers @djaglowski @StefanKurek
-receiver/carbonreceiver/                                 @open-telemetry/collector-contrib-approvers 
 receiver/chronyreceiver/                                 @open-telemetry/collector-contrib-approvers @MovieStoreGuy @jamesmoessis
 receiver/cloudflarereceiver/                             @open-telemetry/collector-contrib-approvers @dehaansa @djaglowski
 receiver/cloudfoundryreceiver/                           @open-telemetry/collector-contrib-approvers @agoallikmaa @pellared @crobert-1
@@ -184,7 +182,7 @@ receiver/dockerstatsreceiver/                            @open-telemetry/collect
 receiver/elasticsearchreceiver/                          @open-telemetry/collector-contrib-approvers @djaglowski @binaryfissiongames
 receiver/expvarreceiver/                                 @open-telemetry/collector-contrib-approvers @jamesmoessis @MovieStoreGuy
 receiver/filelogreceiver/                                @open-telemetry/collector-contrib-approvers @djaglowski
-receiver/filereceiver/                               @open-telemetry/collector-contrib-approvers @pmcollins @djaglowski
+receiver/filereceiver/                                   @open-telemetry/collector-contrib-approvers @pmcollins @djaglowski
 receiver/filestatsreceiver/                              @open-telemetry/collector-contrib-approvers @atoulme
 receiver/flinkmetricsreceiver/                           @open-telemetry/collector-contrib-approvers @jonathanwamsley @djaglowski
 receiver/fluentforwardreceiver/                          @open-telemetry/collector-contrib-approvers @dmitryax
@@ -237,13 +235,12 @@ receiver/splunkhecreceiver/                              @open-telemetry/collect
 receiver/snowflakereceiver/                              @open-telemetry/collector-contrib-approvers @dmitryax @shalper2
 receiver/sqlqueryreceiver/                               @open-telemetry/collector-contrib-approvers @dmitryax @pmcollins
 receiver/sqlserverreceiver/                              @open-telemetry/collector-contrib-approvers @djaglowski @StefanKurek
-receiver/sshcheckreceiver/                              @open-telemetry/collector-contrib-approvers @nslaughter @codeboten
+receiver/sshcheckreceiver/                               @open-telemetry/collector-contrib-approvers @nslaughter @codeboten
 receiver/statsdreceiver/                                 @open-telemetry/collector-contrib-approvers @jmacd @dmitryax
 receiver/syslogreceiver/                                 @open-telemetry/collector-contrib-approvers @djaglowski
 receiver/tcplogreceiver/                                 @open-telemetry/collector-contrib-approvers @djaglowski
 receiver/udplogreceiver/                                 @open-telemetry/collector-contrib-approvers @djaglowski
 receiver/vcenterreceiver/                                @open-telemetry/collector-contrib-approvers @djaglowski @schmikei
-receiver/wavefrontreceiver/                              @open-telemetry/collector-contrib-approvers 
 receiver/webhookeventreceiver/                           @open-telemetry/collector-contrib-approvers @atoulme @shalper2
 receiver/windowseventlogreceiver/                        @open-telemetry/collector-contrib-approvers @djaglowski @armstrmi
 receiver/windowsperfcountersreceiver/                    @open-telemetry/collector-contrib-approvers @dashpole
@@ -253,3 +250,11 @@ receiver/zookeeperreceiver/                              @open-telemetry/collect
 testbed/                                                 @open-telemetry/collector-contrib-approvers @open-telemetry/collector-approvers
 testbed/mockdatareceivers/mockawsxrayreceiver/           @open-telemetry/collector-contrib-approvers @wangzlei @srprash
 testbed/mockdatasenders/mockdatadogagentexporter/        @open-telemetry/collector-contrib-approvers @boostchicken
+
+
+## UNMAINTAINED components
+## The Github issue template generation code needs this to generate the corresponding labels.
+
+exporter/carbonexporter/                                 @open-telemetry/collector-contrib-approvers 
+receiver/carbonreceiver/                                 @open-telemetry/collector-contrib-approvers 
+receiver/wavefrontreceiver/                              @open-telemetry/collector-contrib-approvers