Upgrade terraform-provider-vault to v4.3.0

[guineveresaenger]

This PR was generated via $ upgrade-provider pulumi/pulumi-vault with significant manual tweaks:

• Removes the fork.patch. All instances of patch conflicts were in files addressed by the upstream removal of the hashicorp/vault dependency - either pertaining to package imports, use of an updated library, or the patch dropped tests, which should not affect us either by presence or absence.

• Removes the BUSL workaround patch due to ^^

• Migrates the remaining docs patch to a DocsEditRule

• Upgrading terraform-provider-vault from 4.2.0 to 4.3.0. Fixes #540

[github-actions[bot]]

Does the PR have any schema changes?

Looking good! No breaking changes found.

New resources:

• index/plugin.Plugin
• index/pluginPinnedVersion.PluginPinnedVersion
• pkiSecret/backendConfigEst.BackendConfigEst

New functions:

• pkiSecret/getBackendConfigEst.getBackendConfigEst

Maintainer note: consult the runbook for dealing with any breaking changes.