resourceIdentity: bump sdk/v2 from 0.27.0 -> 0.28.1

[BBBmau]

0.28.1 introduces a fix which was blocking the merging of resource identity due to null attributes being validated on a resource update, this would cause errors for users on AWS when attempting to update a resource with an existing identity.

• identity: Update change validation to ensure empty identities (all null attributes) are not validated hashicorp/terraform-plugin-sdk#1527

This will also require us to bump the Golang version from 1.13->1.14 in our CI configurations

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[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 33 files changed, 293 insertions(+), 202 deletions(-))
google-beta provider: Diff ( 34 files changed, 293 insertions(+), 196 deletions(-))

Errors

google provider:

• The diff processor failed to build. This is usually due to the downstream provider failing to compile.

google-beta provider:

• The diff processor failed to build. This is usually due to the downstream provider failing to compile.

[modular-magician]

Tests analytics

Total tests: 0
Passed tests: 0
Skipped tests: 0
Affected tests: 0

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