default tags: zero value, duplicate, and computed tags

[johnsonaj]

Description

Update tags and default_tags to do the following using SDKv2.

• Allow duplicate tags in both tags and default_tags. Default tags can be overwritten by resource tags.
• Allow zero value "" tags in both tags and default_tags
• Allow Computed tags.

Relations

Relates #29747
Relates #29842
Relates #24449

References

Output from Acceptance Testing

$ make testacc TESTARGS='-run=TestAccMediaLiveInputSecurityGroup_updateTags' PKG=medialive

==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/medialive/... -v -count 1 -parallel 20  -run=TestAccMediaLiveInputSecurityGroup_updateTags -timeout 180m
=== RUN   TestAccMediaLiveInputSecurityGroup_updateTags
=== PAUSE TestAccMediaLiveInputSecurityGroup_updateTags
=== CONT  TestAccMediaLiveInputSecurityGroup_updateTags
--- PASS: TestAccMediaLiveInputSecurityGroup_updateTags (35.98s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/medialive	39.173s
...

$ make testacc TESTS='TestAccVPC_DefaultTags|TestAccVPC_tags|TestAccVPC_basic|TestAccVPC_disappears' PKG=vpc

==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccVPC_DefaultTags|TestAccVPC_tags|TestAccVPC_basic|TestAccVPC_disappears'  -timeout 180m
--- PASS: TestAccVPC_disappears (16.05s)
--- PASS: TestAccVPC_DefaultTagsProviderAndResource_duplicateTag (17.24s)
--- PASS: TestAccVPC_tags_computed (19.99s)
--- PASS: TestAccVPC_basic (21.83s)
--- PASS: TestAccVPC_DefaultTags_updateToResourceOnly (30.39s)
--- PASS: TestAccVPC_DefaultTags_updateToProviderOnly (30.47s)
--- PASS: TestAccVPC_DefaultTags_zeroValue (36.87s)
--- PASS: TestAccVPC_DefaultTags_providerOnlyTestAccVPC_DefaultTags_providerOnly (39.20s)
--- PASS: TestAccVPC_DefaultTagsProviderAndResource_nonOverlappingTag (40.32s)
--- PASS: TestAccVPC_DefaultTagsProviderAndResource_overlappingTag (40.32s)
--- PASS: TestAccVPC_tags (44.92s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	47.973s

[github-actions]

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[github-actions]

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