Add Secrets SDK with Rust keyring bindings

[t1m0thyj]

What It Does
Resolves #208 by adding Python to Rust bindings that use the same keyring backend as the Node SDK.
Replaced all references to the keyring package with our own keyring subpackage in the Secrets SDK.
Added Secrets SDK as an optional dependency of the core SDK that can be installed with the secrets feature.

• Merge feat(secrets): Core crate to expose Rust modules as library zowe-cli#1844
• Update zowe-cli branch in Cargo.toml
• Merge Enable release workflows to publish prerelease to PyPI #223
• Add "release-dev" label to this PR

How to Test
Reinstall dependencies after pulling this branch. The install script for Secrets SDK should build the keyring binary.

Manually test the methods of the keyring package with this script:

from zowe.core_for_zowe_sdk import CredentialManager
from zowe.secrets_for_zowe_sdk import keyring
# Store short password using keyring module directly
password = "abc123"
keyring.set_password("Test", "ShortPassword", password)
assert keyring.get_password("Test", "ShortPassword") == password
assert keyring.delete_password("Test", "ShortPassword")
assert keyring.get_password("Test", "ShortPassword") is None
# Store long password using CredentialManager wrapper
password *= 512
CredentialManager._set_credential("Test", "LongPassword", password)
assert CredentialManager._get_credential("Test", "LongPassword") == password
CredentialManager._delete_credential("Test", "LongPassword")
assert CredentialManager._get_credential("Test", "LongPassword") is None

Review Checklist
I certify that I have:

• tested my changes
  • Windows
  • Linux
  • MacOS
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments
Coauthored with @traeok 🙂

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (05aa573) 82.88% compared to head (f21170e) 83.16%.

Files	Patch %	Lines
.../core/zowe/core_for_zowe_sdk/credential_manager.py	93.33%	2 Missing ⚠️
tests/unit/test_zowe_core.py	97.72%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #222      +/-   ##
==========================================
+ Coverage   82.88%   83.16%   +0.27%     
==========================================
  Files          33       34       +1     
  Lines        2115     2067      -48     
==========================================
- Hits         1753     1719      -34     
+ Misses        362      348      -14     

Flag	Coverage Δ
unittests	83.16% <96.05%> (+0.27%)	⬆️

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[traeok]

I feel awkward approving this, as I had some commits on this PR and did some related work to prepare the secrets_core crate 😅

But, everything LGTM though - thanks @t1m0thyj

[zFernand0]

LGTM! 😋

Seems to work just fine with more than just ascii 😋