Fix tls route event map

[u-kai]

What type of PR is this?
bug

Which issue does this PR fix:
#669

What does this PR do / Why do we need it:
Fixed incomplete detection of events related to TLSRoute, as described in the issue.

If an issue # is not available please add repro steps and logs from aws-gateway-controller showing the issue:

Testing done on this change:

With this change, as shown in the attached image, when the podIP changes, the TargetGroup association will also be updated accordingly.

Automation added to e2e:

None
Will this PR introduce any new dependencies?:

None
Will this break upgrades or downgrades. Has updating a running cluster been tested?:
No, this change does not break upgrades or downgrades.
Unit tests and end-to-end (e2e) tests confirm that the system behaves as expected.

Does this PR introduce any user-facing change?:

Do all end-to-end tests successfully pass when running make e2e-test?:

SECONDARY_ACCOUNT_TEST_ROLE_ARN=arn:aws:iam:xxxxxxxxxxxx:role/TestRole REGION=ap-northeast-1  make e2e-test
...
------------------------------
[SynchronizedAfterSuite] 
/Users/kai/aws-application-networking-k8s/test/suites/integration/suite_test.go:72
{"level":"info","ts":"2025-02-16T19:42:31.835+0900","caller":"test/framework.go:266","msg":"Deleting objects: *v1.Gateway/test-gateway, *v1.Pod/grpc-runner"}
{"level":"info","ts":"2025-02-16T19:42:31.884+0900","caller":"test/framework.go:285","msg":"Waiting for NotFound, objects: *v1.Gateway/test-gateway, *v1.Pod/grpc-runner"}
[SynchronizedAfterSuite] PASSED [32.103 seconds]
------------------------------

Ran 69 of 69 Specs in 2844.480 seconds
SUCCESS! -- 69 Passed | 0 Failed | 0 Pending | 0 Skipped

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[rlymbur]

LGTM 🚀