feat: add build-local target for easing local development

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Relates OR Closes #0000

Add new target build-local to the Makefile for building the provider locally.
Invoke post-build.sh script after the local build process to handle post-build tasks.
Ensure cross-platform compatibility by setting appropriate paths for:
- Linux and macOS: $HOME/.terraform.d/plugins and $HOME/.terraformrc.
- Windows: %APPDATA%/terraform.d/plugins and %APPDATA%/terraform.rc.
Update the Terraform configuration file based on the operating system.
Provide clear instructions for updating the Terraform configuration.

Output from make build-local:

$ make build-local

==> Checking that code complies with gofmt requirements...
go vet .
go install
mkdir -p /Users/shuaib/.terraform.d/plugins/registry.terraform.io/ibm-cloud/ibm/0.0.1/darwin_arm64
mv /Users/shuaib/go/bin/terraform-provider-ibm /Users/shuaib/.terraform.d/plugins/registry.terraform.io/ibm-cloud/ibm/0.0.1/darwin_arm64/terraform-provider-ibm_v0.0.1
./scripts/post-build.sh 0.0.1

==> Updating /Users/shuaib/.terraformrc file...

⬇ Add the following to your Terraform configuration:

terraform {
  required_providers {
    ibm = {
      source  = "IBM-Cloud/ibm"
      version = "0.0.1"
    }
  }
}
...

IBM-Cloud / terraform-provider-ibm

feat: add build-local target for easing local development #5423

Community Note