refactor: remove --builder in context use

[jLopezbarb]

Proposed changes

Fixes DEV-430

Removes the -b or --builder in the okteto context command.

CLI Quality Reminders 🔧

For both authors and reviewers:

• Scrutinize for potential regressions
• Ensure key automated tests are in place
• Build the CLI and test using the validation steps
• Assess Developer Experience impact (log messages, performances, etc)
• If too broad, consider breaking into smaller PRs
• Adhere to our code style and code review guidelines

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 43.88%. Comparing base (85f1f8a) to head (a39ce84).

Additional details and impacted files

@@                        Coverage Diff                        @@
##           ultra-mega-release-branch-3.0    #4349      +/-   ##
=================================================================
- Coverage                          43.90%   43.88%   -0.02%     
=================================================================
  Files                                366      366              
  Lines                              29608    29603       -5     
=================================================================
- Hits                               12999    12991       -8     
- Misses                             15504    15506       +2     
- Partials                            1105     1106       +1