feat: Make db-models no-std (#14459)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>
Co-authored-by: Arsenii Kulikov <klkvrr@gmail.com>
Co-authored-by: alpharush <0xalpharush@protonmail.com>
Co-authored-by: DaniPopes <57450786+DaniPopes@users.noreply.github.com>
Co-authored-by: Alexey Shekhirin <5773434+shekhirin@users.noreply.github.com>
Co-authored-by: Dan Cline <6798349+Rjected@users.noreply.github.com>
Co-authored-by: Federico Gimenez <fgimenez@users.noreply.github.com>
Co-authored-by: Roman Krasiuk <rokrassyuk@gmail.com>
Co-authored-by: Ryan Schneider <ryanleeschneider@gmail.com>
Co-authored-by: Bilog WEB3 <155262265+Bilogweb3@users.noreply.github.com>
Co-authored-by: Vitalyr <158586577+Vitaliyr888@users.noreply.github.com>
Co-authored-by: Yohann Kazoula <yoh.kzl@gmail.com>
Co-authored-by: Shourya Chaudhry <149008800+18aaddy@users.noreply.github.com>
Co-authored-by: Poulav Bhowmick <bpoulav@gmail.com>
Co-authored-by: urb <urbadeil@gmail.com>
Co-authored-by: Emilia Hane <elsaemiliaevahane@gmail.com>

.github/assets/check_rv32imac.sh

@@ -15,6 +15,7 @@ crates_to_check=(
     reth-storage-errors
     reth-execution-errors
     reth-execution-types
+    reth-db-models
 
     ## ethereum
     reth-ethereum-forks