f32/f64/usize in cosmwasm(and other no f32/f64 envs) reproduction and fixes

[dzmitry-lahoda]

Closes: #800

Description

[nix-shell:~/github.com/cosmos/ibc-rs/ci/cw-check]$ cw-check
warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
package:   /home/dz/github.com/cosmos/ibc-rs/ci/cw-check/Cargo.toml
workspace: /home/dz/github.com/cosmos/ibc-rs/Cargo.toml
   Compiling ibc v0.43.1 (/home/dz/github.com/cosmos/ibc-rs/crates/ibc)
   Compiling cw-check v0.1.0 (/home/dz/github.com/cosmos/ibc-rs/ci/cw-check)
    Finished release [optimized] target(s) in 4.85s
Available capabilities: {"cosmwasm_1_1", "iterator", "cosmwasm_1_2", "staking", "stargate"}

./target/wasm32-unknown-unknown/release/cw_check.wasm: pass

All contracts (1) passed checks!

[nix-shell:~/github.com/cosmos/ibc-rs/ci/cw-check]$ cw-check
   Compiling ibc v0.43.1 (/home/dz/github.com/cosmos/ibc-rs/crates/ibc)
   Compiling cw-check v0.1.0 (/home/dz/github.com/cosmos/ibc-rs/ci/cw-check)
    Finished release [optimized] target(s) in 7.30s
Available capabilities: {"staking", "cosmwasm_1_2", "iterator", "cosmwasm_1_1", "stargate"}

./target/wasm32-unknown-unknown/release/cw_check.wasm: failure
Error compiling Wasm: Could not compile: WebAssembly translation error: Error in middleware Gatekeeper: Float operator detected: F64Load { memarg: MemoryImmediate { align: 3, offset: 8, memory: 0 } }. The use of floats is not supported.

Passes: 0, failures: 1

---

PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).