chore: Update TF versions in CI

[ekampf]

Update to latest supported TF versions (1.7.* is EOL)

[linear]

OSS-43 Terraform Provider - EOL TF 1.7.*

[twingate-blee]

lgtm

[coveralls]

Pull Request Test Coverage Report for Build 10083919169

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1422 unchanged lines in 32 files lost coverage.
• Overall coverage decreased (-18.7%) to 64.27%

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Files with Coverage Reduction	New Missed Lines	%
twingate/internal/client/resource.go	2	93.36%
twingate/internal/client/variables.go	2	98.71%
twingate/internal/client/group.go	2	97.71%
twingate/internal/provider/datasource/resources.go	4	87.41%
twingate/internal/client/query/groups-read.go	4	88.46%
twingate/internal/provider/datasource/service-accounts.go	4	85.09%
twingate/internal/provider/datasource/users.go	7	84.91%
twingate/internal/provider/datasource/converter.go	8	87.3%
twingate/internal/client/cache.go	8	75.7%
twingate/internal/client/user.go	8	94.07%

Totals
Change from base Build 10046415228:	-18.7%
Covered Lines:	4880
Relevant Lines:	7593

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💛 - Coveralls