Populate cve column in pm_advisories at ingestion

What does this MR do and why?

A new cve column is to be added to the pm_advisories table to support querying of CVE entries. This MR implements population of the cve column in pm_advisories when ingesting data from PMDB.

Related to #510321 (closed)

Testing

Tested by running:

worker = PackageMetadata::AdvisoriesSyncWorker.new
worker.perform

Results:

gitlabhq_development=# select id, title, cve from pm_advisories limit 20;
  id   |                                        title                                         |      cve
-------+--------------------------------------------------------------------------------------+----------------
 14990 | Incorrect Permission Assignment for Critical Resource                                | CVE-2017-6928
 14991 | Blind XSS Leading to Froxlor Application Compromise                                  | CVE-2024-34070
 14992 | Cross-site Scripting                                                                 | CVE-2021-32470
 14993 | Improper Control of Generation of Code ('Code Injection')                            | CVE-2023-32692
 14994 | Improper Control of Generation of Code ('Code Injection')                            | CVE-2023-32692
 14995 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CVE-2023-3083
 15517 | Code Injection                                                                       |
 14996 | SQL Injection                                                                        |
 14997 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CVE-2023-3086
 14998 | Improper Access Control                                                              | CVE-2023-3095
 14999 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CVE-2023-37611
 15000 | Improper Access Control                                                              | CVE-2024-22407
 15001 | Observable Discrepancy                                                               | CVE-2020-9588
 16380 | Cross-site Scripting                                                                 |
 15002 | Improper Input Validation                                                            | CVE-2023-22730
 15003 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CVE-2023-2518
 15004 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CVE-2023-3191
 15005 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')       | CVE-2023-3172
 15006 | Session Fixation                                                                     | CVE-2023-3192
 15007 | Improper Restriction of Excessive Authentication Attempts                            | CVE-2023-3173

CVE field is populated as expected!

References

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Before	After

How to set up and validate locally

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Related to #510321 (closed)