create-ethernet-map lib instead of bin

[broskoTT]

Related to #99

This change will simplify our build system changes by a lot. No additional artefacts needed to be shipped with libdevice, and no thinking about relative/absolute path once the lib is built.

@TTDRosen provided this library.

Changes:

• Add lib to git, add it to build system.
• Remove CEM binary from git
• Add cluster yaml creation to tt_ClusterDescriptor
• Use this interface in tests, remove deprecated GetClusterDescYAML

The following PR will remove cluster yaml altogether. Both from tt_ClusterDescriptor interface and from tt_SiliconDevice. Didn't want to overwhelm this PR.

This change requires client changes. Breaks existing references to create-ethernet-map binary

• tt_metal corresponding PR: UMD bump: Remove usage of create-ethernet-map tt-metal#14718
• tt_debuda has its own CEM so it will continue to build without any changes.

[joelsmithTT]

Can you or @TTDRosen add instructions for generating this new binary and perhaps consider maintaining ARM64 support in UMD (which this change breaks), and possibly adding RISC-V support? There's community interest in the latter and I have hardware setups for both. (I did N150 home trials with an Ampere system and although I never merged the metal support it would be nice if this kept working)

[TTDRosen]

I am not sure of the appropriate place to put this (someone please advise) but to reduce our bus factor.

From luwen root
cargo build -p create-ethernet-map --release --lib

[joelsmithTT]

Great, thanks @TTDRosen. This change is fine with me provided that cargo command plus a link to Luwen is placed in a comment (maybe in the CMakeLists.txt?) so anyone with a non-X86 platform can build and swap out that binary.