making project access token sensitive

[pawelsz-rb]

Description of the change

making project access token sensitive. Notice now access token is not displayed to the user in the terraform plan, apply or destroy:

 # rollbar_project_access_token.test_1 will be created
  + resource "rollbar_project_access_token" "test_1" {
      + access_token                = (sensitive value)
      + cur_rate_limit_window_count = (known after apply)
      + cur_rate_limit_window_start = (known after apply)
      + date_created                = (known after apply)
      + date_modified               = (known after apply)
      + id                          = (known after apply)
      + name                        = "test-token-1"
      + project_id                  = 222222222222222222
      + rate_limit_window_count     = 500
      + rate_limit_window_size      = 60
      + scopes                      = [
          + "post_client_item",
        ]
      + status                      = "enabled"
    }

if the users intentionally want to see a sensitive variable, they can use:
terraform show --json

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

relates to PR #384

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer

[coveralls]

Pull Request Test Coverage Report for Build 8386010945

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.097%

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Totals
Change from base Build 8170248558:	0.0%
Covered Lines:	1480
Relevant Lines:	1607

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💛 - Coveralls

[codeclimate]

Code Climate has analyzed commit f67f8dd and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 92.0% (0.0% change).

View more on Code Climate.

[github-actions]

🎉 This PR is included in version 1.14.0 🎉

The release is available on:

• GitHub release
• v1.14.0

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