Update branch master to support Rolling only

[asorbini]

This PR updates branch master to make it buildable only with the Rolling release.

The PR removes all "feature flags" from static_config.hpp, including RMW_CONNEXT_RELEASE and any code meant to support earlier releases.

This PR must be merged before creating the next Galactic release in order to be able to create a maintenance branch from the updated master.

The code was changed assuming the following "feature configuration":

Feature	Value
RMW_CONNEXT_RELEASE	RMW_CONNEXT_RELEASE_ROLLING
RMW_CONNEXT_HAVE_PKG_RMW_DDS_COMMON	1
RMW_CONNEXT_HAVE_SCOPE_EXIT	1
RMW_CONNEXT_HAVE_GET_DOMAIN	1
RMW_CONNEXT_HAVE_OPTIONS	1
RMW_CONNEXT_HAVE_OPTIONS_PUBSUB	1
RMW_CONNEXT_HAVE_INCOMPATIBLE_QOS	1
RMW_CONNEXT_HAVE_INCOMPATIBLE_QOS_EVENT	1
RMW_CONNEXT_HAVE_LIFESPAN_QOS	1
RMW_CONNEXT_HAVE_MESSAGE_LOST	1
RMW_CONNEXT_HAVE_SERVICE_INFO	1
RMW_CONNEXT_HAVE_LOCALHOST_ONLY	1
RMW_CONNEXT_HAVE_TAKE_SEQ	1
RMW_CONNEXT_HAVE_SECURITY	1
RMW_CONNEXT_HAVE_COMMON_MUTEX	1
RMW_CONNEXT_HAVE_LOAN_MESSAGE	1
RMW_CONNEXT_HAVE_MESSAGE_INFO_TS	1
RMW_CONNEXT_HAVE_GET_INFO_BY_TOPIC	1
RMW_CONNEXT_HAVE_QOS_PROFILE_API	1
RMW_CONNEXT_HAVE_TIME_UTILS	1

Note to reviewers: It would be great to review these changes but they are somewhat trivial. I'm creating this PR mainly to keep track of them for future reference.

[asorbini]

CI jobs to validate the changes:

• ci_linux:
• ci_osx:
• ci_windows:

EDIT: validate uncrustify errors:

• ci_linux:
• ci_osx:
• ci_windos:

[clalancette]

I just briefly glanced at it, but what I did look at looks good to me. I think this is the right direction to go in, thanks!

[wjwwood]

I also only skimmed the code changes, but README lgtm, and the general pattern of changes lgtm.

I'm happy if CI is happy :)

[asorbini]

Making sure everything is good after merging:

• ci_linux:
• ci_osx:
• ci_windows: