Fix and improve compliance pipeline example

What does this MR do?

Improves the compliance framework .gitlab-ci.yml example by:

• ensuring consistent spacing
• dropping unessecary/redundant config (when: always & allow_failure: false are default)
• change sast job name to prevent customers from directly overriding and adding scripts to the config-only default sast job
• note that including an individual projects' config as part of compliance pipeline will only work if the project has it's own .gitlab-ci.yml file.

As a bonus, I fixed up the markdown table formatting on this page.

This MR was created to address customer problems/misunderstandings w/r/t the example in our docs. Specifically this Support ticket and a Federal Support Ticket

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• I have included a changelog entry, or it's not needed. (Does this MR need a changelog?)
• I have added/updated documentation, or it's not needed. (Is documentation required?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.

Availability and Testing

• I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
• I have tested this MR in all supported browsers, or it's not needed.
• I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.

Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team