(SUP-2640) Add Basic acceptance testing for tasks

(SUP-2655) Update Minimum Supported Bolt Version to 1.38.0

Update to readme file for clarity and removal of $PUPPET_BIN/ as redundant and prone to mislead

(SUP-2678) Update Readme ca_extend::check_agent_expiry task runs against primary server and not agent nodes

…_protocols

(SUP-2923) Replace unencrypted git protocol in .fixtures.yaml

At one point, REFERENCE.md contained a sample bolt inventory file, but
this was removed to avoid duplicating Bolt documentation.  This commit
removes the reference from README.md

(SUP-2814) Remove ref to sample inventory file.

Prior to this commit, there was some bash shorthand in the readme. This
is prone to failues as customers may not run the commands exactly as
written. For example, if a customer ran 'ls' prior to 'cd !$', the
command would be incorrect. This commit updates those commands to be
explict.

(maint) Use explicit commands in the README

This commit adds how to use a file resource to distribute a copy of the
CA certificate to agents. Additionally, this commit reorganize the
usage steps for running the plan to distribute the new CA and removes
references to PCP transport because not all tasks/plans in ca_extend
support use via the Orchestrator.

(SUP-3054) README Updates

This commit adds how to use a file resource to distribute a copy of the
CA certificate to agents. Additionally, this commit reorganize the
usage steps for running the plan to distribute the new CA and removes
references to PCP transport because not all tasks/plans in ca_extend
support use via the Orchestrator.

[SUP-3096] Update Stdlib deps and PDK template

This commit adds an example of using --query with the upload plan.
Additionally, the instructions for using the upload plan have been
reorganized to display the differences and tradeoffs for using an
inventory file. Also, minor changes to phrasing and providing an
example of what users may set cert to for the upload plan.

(SUP-2742) adds examples of the usage of ca_extend::upload_ca_cert

Release prep v3.1.0