[CI] make update-otel (open-telemetry#32038)

**Description:** 
Seems like there were some bugs, which i wasn't very sure about.
It ran the `multimod` cmd with the wrong directory (at least in my
case).
On top of that i had to remove the `--commit-hash` flag, because per
definition it already gets the main branch, but you should have to
insert a commit-hash.
If not used at all it should just be the latest. Therefore
`OTEL_VERSION` and `OTEL_STABLE_VERSION` could be removed or could later
on be used to get the latest commit-hash (but has to be implemented).

The core-versions in `otelcontribcol/builder-config.yaml` and
`oteltestbedcol/builder-config.yaml` will be updated by using `sed`.
But these additional lines will only replace sth like:

`v0.97.1-0.20240327181407-1038b67c85a0`
and update it to:
`v0.98.0`

So if someone needs any kind of specific version-hash, he still would
have to change this manually.

This definitely is not a perfect solution for this issue (it just works
:sweat_smile: ) , so just tell me if there is something totally stupid
in this code.


**Link to tracking Issue:** 
- Resolves open-telemetry#21632 

**Testing:** <Describe what testing was performed and which tests were
added.>

**Documentation:** <Describe the documentation added.>

---------

Co-authored-by: Alex Boten <[email protected]>

Makefile

@@ -6,6 +6,9 @@ OTEL_VERSION=main
 OTEL_STABLE_VERSION=main
 
 VERSION=$(shell git describe --always --match "v[0-9]*" HEAD)
+TRIMMED_VERSION=$(shell grep -o 'v[^-]*' <<< "$(VERSION)" | cut -c 2-)
+CORE_VERSIONS=$(SRC_PARENT_DIR)/opentelemetry-collector/versions.yaml
+GOMOD=$(SRC_ROOT)/go.mod
 
 COMP_REL_PATH=cmd/otelcontribcol/components.go
 MOD_NAME=github.com/open-telemetry/opentelemetry-collector-contrib
@@ -344,13 +347,44 @@ telemetrygen:
 	cd ./cmd/telemetrygen && GO111MODULE=on CGO_ENABLED=0 $(GOCMD) build -trimpath -o ../../bin/telemetrygen_$(GOOS)_$(GOARCH)$(EXTENSION) \
 		-tags $(GO_BUILD_TAGS) .
 
+# helper function to update the core packages in builder-config.yaml
+# input parameters are 
+# $(1) = path/to/versions.yaml (where it greps the relevant packages)
+# $(2) = path/to/go.mod (where it greps the package-versions)
+# $(3) = path/to/builder-config.yaml (where we want to update the versions)
+define updatehelper
+	if [ ! -f $(1) ] || [ ! -f $(2) ] || [ ! -f $(3) ]; then \
+			echo "Usage: updatehelper <versions.yaml> <go.mod> <builder-config.yaml>"; \
+			exit 1; \
+	fi
+	grep "go\.opentelemetry\.io" $(1) | sed 's/^\s*-\s*//' | while IFS= read -r line; do \
+			if grep -qF "$$line" $(2); then \
+					package=$$(grep -F "$$line" $(2) | head -n 1 | awk '{print $$1}'); \
+					version=$$(grep -F "$$line" $(2) | head -n 1 | awk '{print $$2}'); \
+					builder_package=$$(grep -F "$$package" $(3) | awk '{print $$3}'); \
+					builder_version=$$(grep -F "$$package" $(3) | awk '{print $$4}'); \
+					if [ "$$builder_package" == "$$package" ]; then \
+						echo "$$builder_version";\
+						sed -i -e "s|$$builder_package.*$$builder_version|$$builder_package $$version|" $(3); \
+						echo "[$(3)]: $$package updated to $$version"; \
+					fi; \
+			fi; \
+	done
+endef
+
+
 .PHONY: update-otel
 update-otel:$(MULTIMOD)
 	$(MULTIMOD) sync -s=true -o ../opentelemetry-collector -m stable --commit-hash $(OTEL_STABLE_VERSION)
-	git add . && git commit -s -m "[chore] multimod update stable modules"
+	git add . && git commit -s -m "[chore] multimod update stable modules" ; \
 	$(MULTIMOD) sync -s=true -o ../opentelemetry-collector -m beta --commit-hash $(OTEL_VERSION)
-	git add . && git commit -s -m "[chore] multimod update beta modules"
+	git add . && git commit -s -m "[chore] multimod update beta modules" ; \
+	$(call updatehelper,$(CORE_VERSIONS),$(GOMOD),./cmd/otelcontribcol/builder-config.yaml) 
+	$(call updatehelper,$(CORE_VERSIONS),$(GOMOD),./cmd/oteltestbedcol/builder-config.yaml)
 	$(MAKE) gotidy
+	$(MAKE) genotelcontribcol
+	$(MAKE) genoteltestbedcol
+	$(MAKE) oteltestbedcol
 
 .PHONY: otel-from-tree
 otel-from-tree: