Update dependency hashicorp/terraform-provider-vault to v3.19.0

[renovate]

This PR contains the following updates:

Package	Update	Change
hashicorp/terraform-provider-vault	minor	3.18.0 -> 3.19.0

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Release Notes

hashicorp/terraform-provider-vault (hashicorp/terraform-provider-vault)

v3.19.0

Compare Source

FEATURES:

• Add support for User ID configuration for PKI Secrets Engine: (#​1936)

BUGS:

• auth/aws: enable namespace support for AWS backend config identity: (#​1961)
• Retry Write on kv-v2 config: (#​1955)
• Update vault_identity_entity to exclude policies from Vault request if external_policies is true: (#​1950)
• Bump Go version to fix macOS resolver issue: (#​1941)

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