Update rcfile advice for force_pic and disable it by default

[jwnimmer-tri]

While we're here, clean up some other non-functional irregularies:

• Remove irrelevant rules_python flag (https://github.com/bazelbuild/bazel/issues/9006).
• Use the correct working directory during bazel version.

Towards https://github.com/RobotLocomotion/drake/issues/20217.

See also https://github.com/RobotLocomotion/drake/pull/20242.

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This change is 

[jwnimmer-tri]

+@rpoyner-tri for feature review, please.

N.B. The current CI failure is a known issue (also broken on main).

[svenevs]

This can be rebased now with #271 in and CI should pass :tm: