r/aws_glue_trigger: fix crash when null action is configured

[jar-b]

Description

Previously a null action caused the provider to panic. Now null actions are not expanded, which may result an error from the AWS API if only null actions are present, but prevents a complete crash.

Also addressed missing nil checks in the remaining expand functions for this resource.

Relations

Closes #31213

Output from Acceptance Testing

% make testacc PKG=glue TESTS=TestAccGlueTrigger_Actions_null
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.22.6 test ./internal/service/glue/... -v -count 1 -parallel 20 -run='TestAccGlueTrigger_Actions_null'  -timeout 360m

--- PASS: TestAccGlueTrigger_Actions_null (6.53s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/glue       15.712s

% make testacc PKG=glue TESTS=TestAccGlueTrigger_
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.22.6 test ./internal/service/glue/... -v -count 1 -parallel 20 -run='TestAccGlueTrigger_'  -timeout 360m

--- PASS: TestAccGlueTrigger_Actions_null (11.93s)
--- PASS: TestAccGlueTrigger_eventBatchingCondition (64.61s)
--- PASS: TestAccGlueTrigger_tags (94.60s)
--- PASS: TestAccGlueTrigger_Actions_security (95.74s)
--- PASS: TestAccGlueTrigger_description (99.00s)
--- PASS: TestAccGlueTrigger_Actions_notify (114.73s)
--- PASS: TestAccGlueTrigger_enabled (119.84s)
--- PASS: TestAccGlueTrigger_workflowName (129.65s)
--- PASS: TestAccGlueTrigger_crawler (134.58s)
--- PASS: TestAccGlueTrigger_basic (141.46s)
--- PASS: TestAccGlueTrigger_startOnCreate (152.00s)
--- PASS: TestAccGlueTrigger_predicate (160.11s)
--- PASS: TestAccGlueTrigger_disappears (166.73s)
--- PASS: TestAccGlueTrigger_onDemandDisable (168.17s)
--- PASS: TestAccGlueTrigger_schedule (173.62s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/glue       182.908s

[github-actions]

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[ewbankkit]

LGTM 🚀.

[github-actions]

This functionality has been released in v5.64.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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