development-dependency: bump hashicorp/kubernetes from 2.5.1 to 2.6.0 in /terraform

Bumps hashicorp/kubernetes from 2.5.1 to 2.6.0.

Release notes

Sourced from hashicorp/kubernetes's releases.

v2.6.0

2.6.0 (October 19, 2021)

IMPROVEMENTS:

• kubernetes_manifest is now GA and enabled by default

BUG FIXES:

• kubernetes_manifest now correctly handles empty blocks as attribute values (#1352)
• kubernetes_manifest now correctly handles multiple CRDs with different number of schema versions (#1460)

Changelog

Sourced from hashicorp/kubernetes's changelog.

2.6.0 (October 19, 2021)

IMPROVEMENTS:

• kubernetes_manifest is now GA and enabled by default

BUG FIXES:

• kubernetes_manifest now correctly handles empty blocks as attribute values (#1352)
• kubernetes_manifest now correctly handles multiple CRDs with different number of schema versions (#1460)

Commits

• 8a742e1 v2.6.0
• bbfd6c2 Update CHANGELOG for v2.6.0
• 592908d Acceptance tests for CRD multiversion fix
• 0f0be85 Hack: work around CRD.spec.versions type corruption
• 19e626a Default kubernetes_manifest experiment to true (#1436)
• f13778c Add missing build tag to test file
• 73b4ed8 Acceptance test for emtpy blocks
• d0f4741 Fix tests
• db342c2 Remove type exceptions for CRD spec.subresources.status. Now covered generica...
• 9c11cf3 Filter empty objects unless set by user before API payload generation
• Additional commits viewable in compare view

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