Apply the `-chdir` option before resolving implied provider filesystem mirror directories

[fnickels]

Fixes Bug reported in https://github.com/hashicorp/terraform/issues/31442

The code to reset the current working directory was previously called after the local providers checked in implicitProviderSource() is called.

I simply moved up the block of code handling the reset of the current working directory ahead of providerSource() which subsequently calls implicitProviderSource() .

I have compiled and tested the code to verify it fixes the cited issue, but can not be 100% sure there are no other side effects from this change. I cannot think of any situation where you need to maintain the CWD when specifying -chdir, but there could be some side effects I am not aware of.

[hashicorp-cla]

All committers have signed the CLA.

[crw]

Thanks for this submission. Although I cannot commit to having this PR reviewed at this time, we acknowledge your contribution and appreciate it! We will discuss it in our weekly triage meeting. Thanks again!