[CI][Hexagon] Update hexagon docker for LLVM

[mehrdadh]

This PR is a follow up to PR #13199

#12966

cc @joshherr-quic

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• cc @Icemist, @Mousius, @areusch, @driazati, @gigiblender, @ibsidorenko, @leandron, @quic-sanirudh _{See #10317 for details}

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[mehrdadh]

@joshherr-quic hexagon tests are failing due to LLVM issues. That needs to be fixed before we merge the new docker image

cc @kparzysz-quic

[kparzysz-quic]

This issue is already fixed in LLVM. We'll try to generate a new docker image and get an updated PR.

[mehrdadh]

@kparzysz-quic sounds good. I'll remove this docker image and wait for your update.