feat: extend cva6_hpdcache_if_adapter (support for hpdcache_icache as well)

[takeshiho0531]

• The parts highlighted in light pink are the ones we want to implement in this PR.

• extend cva6_hpdcache_if_adapter so that it can also convert input request/response to the appropriate type for hpdcache when using hpdcache as icache. (ex. input type:icache_req_t → output type: hpdcache_req_t)

[github-actions[bot]]

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[yanicasa]

I am currently working on the redefinition of the interfaces between the cache and the front end and the LSU, I think this is a subject related to yours, I have a dev branch open in the CVA6 repo where I simplified the icache kill mechanism and moved the fetch address translation request from icache to frontend.

For my part I am looking for someone who could adapt the caches to these new interfaces that I am developing in the front end and the LSU

Branch: https://github.com/openhwgroup/cva6/tree/feature/interconnect

@cfuguet @JeanRochCoulon