Accommodate the new OpenSSL behavior when failed to decrypt certs

[nagworld9]

Description

fixing #3163

If the decryption fails, old version of openssl overwrite the output file(if exist) with empty data while
new version of openssl does not overwrite the output file, so output file may contain old certs data and agent process the old certs again. Correcting the behavior by removing temporary state certificate files.

2024-08-28T00:22:15.391660Z ERROR ExtHandler ExtHandler Failed to decrypt /var/lib/waagent/Certificates.p7m (return code: 1)
[stdout]
 
[stderr]
Error reading SMIME Content Info
4072163C0D7B0000:error:0680008E:asn1 encoding routines:asn1_d2i_read_bio:not enough data:crypto/asn1/a_d2i_fp.c:216:
4072163C0D7B0000:error:0680006E:asn1 encoding routines:b64_read_asn1:decode error:crypto/asn1/asn_mime.c:151:
4072163C0D7B0000:error:068000CB:asn1 encoding routines:SMIME_read_ASN1_ex:asn1 parse error:crypto/asn1/asn_mime.c:500:
 
2024-08-28T00:22:15.391869Z INFO ExtHandler ExtHandler Removing temporary state certificate files ['/var/lib/waagent/Certificates.p7m', '/var/lib/waagent/Certificates.pem']
2024-08-28T00:22:15.392123Z INFO ExtHandler ExtHandler Removed file /var/lib/waagent/Certificates.p7m
2024-08-28T00:22:15.392267Z INFO ExtHandler ExtHandler Removed file /var/lib/waagent/Certificates.pem
2024-08-28T00:22:15.392632Z INFO ExtHandler Fetch goal state completed

Issue #

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PR information

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• New Unit tests were added for the changes made

Quality of Code and Contribution Guidelines

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[narrieta]

one minor comment

[narrieta]

let's add the "new version" value to the comment, in case we ever need it in the future

[codecov]

Codecov Report

Attention: Patch coverage is 90.32258% with 3 lines in your changes missing coverage. Please review.

Project coverage is 72.30%. Comparing base (3aebcdd) to head (2181751).
Report is 297 commits behind head on develop.

Files with missing lines	Patch %	Lines
azurelinuxagent/common/utils/cryptutil.py	72.72%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3197      +/-   ##
===========================================
+ Coverage    71.97%   72.30%   +0.32%     
===========================================
  Files          103      114      +11     
  Lines        15692    16953    +1261     
  Branches      2486     2448      -38     
===========================================
+ Hits         11295    12258     +963     
- Misses        3881     4131     +250     
- Partials       516      564      +48     

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