Owned Proxy - update to support forc deploy proxy feature

[K1-R1]

Type of change

• Improvement (refactoring, restructuring repository, cleaning tech debt, ...)

Changes

The following changes have been made:

• The Owned Proxy contract has been updated to forc v0.63.3, with the standardized storage slot for target and proxy_owner pinned with the new in keyword.
• The Owned Proxy scripts have been updated to fuel-rs v0.66.3
• The test harness is updated to use forc v0.63.3 and fuel-rs v0.66.3
• README badges have been updated
• The "versions in use" note has been removed from the root README and project specific forc version badges are now used.

Notes

• An unused test file that was copied from sway-libs/upgradeability has been removed

Related Issues

Closes #11
Closes #13
Closes #23
Closes #24

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant.
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.
• I have updated the changelog to reflect the changes on this PR.

[K1-R1]

Blocked by FuelLabs/sway#6447 and the error that the Sway repo is facing:

failed to run custom build command for fuel-core-upgradable-executor v0.33.0

[K1-R1]

Seeking to debug the CI issues here in #25