Update dependency mysql:mysql-connector-java to v8

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mysql:mysql-connector-java	compile	major	5.1.26 -> 8.0.28

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	8.3	CVE-2023-22102	#31
Medium	6.6	CVE-2022-21363	#24
Medium	6.3	CVE-2019-2692	#6
Medium	5.0	CVE-2020-2934	#9
Medium	4.7	CVE-2020-2875	#11
Medium	4.2	CVE-2015-2575	#26

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