v1.15.0

Ipopt v1.15.0

Diff since v1.14.3

Merged pull requests:

• Support MUMPS 5.9.0 and upcoming HSL_jll.jl (#542) (@amontoison)
• Bump codecov/codecov-action from 6 to 7 (#543) (@dependabot[bot])
• Bump actions/checkout from 6 to 7 (#544) (@dependabot[bot])
• Prep for v1.15.0 (#545) (@odow)