Update dependency hashicorp/terraform to v1.2.8

[renovate]

This PR contains the following updates:

Package	Update	Change
hashicorp/terraform	patch	1.2.7 -> 1.2.8

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Release Notes

hashicorp/terraform

v1.2.8

Compare Source

1.2.8 (August 24, 2022)

BUG FIXES:

• config: The flatten function will no longer panic if given a null value that has been explicitly converted to or implicitly inferred as having a list, set, or tuple type. Previously Terraform would panic in such a situation because it tried to "flatten" the contents of the null value into the result, which is impossible. (#​31675)
• config: The tolist, toset, and tomap functions, and various automatic conversions that include similar logic, will no longer panic when asked to infer an element type that is convertable from both a tuple type and a list type whose element type is not yet known. (#​31675)

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Configuration

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