chore: Make renovate behave more like dependabot

[thompson-tomo]

This has been tested to resolve the following issues:

• incorrect grouping of otel dependencies - resolved by changing order & match pattern
• Not updating tests directory - adjustment to the ignore paths
• Partial test of incorrect pr titles - review of logs showed title changing due to adding scope to label rule

this also seperates major updates from other groups & adds approval to avoid accidentally merging major bump as well as enable to delay them till after minor etc. We can certainly change this rule.