drivers: stepper: include enable and microstep pins in common config

[HongNguyen635]

Fixes #101079

This PR moves the init code for en-gpios, m0-gpios and m1-gpios to common init instead of initialize them individually in the driver.

@jilaypandya please let me know if this is the right change you are expecting and appreciate some feedback if not.

[github-actions]

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[HongNguyen635]

first time contributing mistake, I've run check_compliance.py and twister test with native_sim and the commit should be ok now.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jilaypandya]

Hi @HongNguyen635, thanks for the PR! LGTM.
Could you maybe share the test output, just to see if the tests have been passed or skipped ?