fix(docker): parse quoted and hyphenated custom docker option values

[andrasbacsai]

Summary

• Fixes the Custom Docker Options parser cutting values off at the first hyphen. For example, --security-opt no-new-privileges:true was turned into security_opt: ['no'], and the deployment then failed with invalid security-opt: "no".
• Values can now be written in three ways: unquoted, double-quoted (with escapes), or single-quoted. This works with both the --flag value and --flag=value forms. The parser strips the surrounding quotes, so --security-opt="no-new-privileges:true" no longer produces "\"no".
• Quoted values can contain spaces and --. Options inside a quoted --entrypoint (for example sh -c '... --privileged ...') are no longer read as separate flags.
• If a quoted value is empty, such as --security-opt="", the option is skipped.
• Removed the special-case --hostname regex. Hostname now goes through the general value parsing, which also handles quoted hostnames.
• Added tests for hyphenated security options, the different quoting styles, quoted list and scalar options, empty quoted values, and flags inside a quoted entrypoint.

fixes #8173

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Fixes #8173