removed auth check when token is passed with konnect flow.

[shivaygupta-dotcom]

1. Removed auth verification for konnect flows except ping command.
2. Removed email/password flow from Konnect entirely as Konnect is completely moved to auth0 flow.
3. Removed email/password flags from help command output.

more details:
https://kongstrong.slack.com/archives/C07AQH7SAF8/p1781862856844639

GH:
#2117
#2120

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 33.40%. Comparing base (25fdf95) to head (43e673d).

Files with missing lines	Patch %	Lines
cmd/common_konnect.go	0.00%	5 Missing ⚠️
tests/integration/test_utils.go	0.00%	4 Missing and 1 partial ⚠️
cmd/konnect_ping.go	0.00%	2 Missing ⚠️
cmd/common.go	0.00%	1 Missing ⚠️
cmd/gateway_ping.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2119      +/-   ##
==========================================
+ Coverage   33.17%   33.40%   +0.22%     
==========================================
  Files          78       78              
  Lines        7433     7385      -48     
==========================================
+ Hits         2466     2467       +1     
+ Misses       4763     4715      -48     
+ Partials      204      203       -1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.