Backport of Update HCL and go-cty to fix optional and default attributes into v1.3

[teamterraform]

Backport

This PR is auto-generated from #32178 to be assessed for backporting due to the inclusion of the label 1.3-backport.

The below text is copied from the body of the original PR.

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• Updates HCL
• Updates go-cty
• Add test cases that verify all the below issues are fixed

• Fixes inconsistent map element types - defaults inside optional object #32157 (Fixed by Don't insert default values into null objects hcl#567)
• Fixes Terraform crash with nested optional default values #32152 (Fixed by Check empty collections for optional attributes zclconf/go-cty#143)
• Fixes Default (optional) values in nested null object cause it to be non-null #32160 (Fixed by Don't insert default values into null objects hcl#567)
• Fixes Strange behavior with optional type constraint and variable default values #32109 (Fixed by Strip dynamic types out of null and unknown values recursively zclconf/go-cty#144)

Target Release

1.3.5

Draft CHANGELOG entry

BUG FIXES

• Fix Terraform creating objects that should not exist in variables that specify default attributes in optional objects.
• Fix several Terraform crashes that are caused by HCL creating objects that should not exist in variables that specify default attributes in optional objects within collections.
• Fix inconsistent behaviour in empty vs null collections

[github-actions]

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[github-actions]

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