chore(deps): update module github.com/hashicorp/terraform-plugin-go to v0.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/terraform-plugin-go	require	minor	v0.14.3 -> v0.15.0

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Release Notes

hashicorp/terraform-plugin-go

### [`v0.15.0`](https://togithub.com/hashicorp/terraform-plugin-go/releases/tag/v0.15.0) [Compare Source](https://togithub.com/hashicorp/terraform-plugin-go/compare/v0.14.3...v0.15.0) NOTES: - all: This Go module has been updated to Go 1.19 per the [Go support policy](https://go.dev/doc/devel/release#policy). It is recommended to review the [Go 1.19 release notes](https://go.dev/doc/go1.19) before upgrading. Any consumers building on earlier Go versions may experience errors. ([#​266](https://togithub.com/hashicorp/terraform-plugin-go/issues/266))

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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