build: investigate shrinking WASM blob size using tiny-go

Nobody has claimed this yet.

Was brought up in this twitter thread: https://twitter.com/roasbeef/status/1486422025816064000

[TinyGo](https://tinygo.org/getting-started/overview/) is an alternate Go compiler that is intended for embedded systems, and support compiling to a [WASM target](https://tinygo.org/docs/guides/webassembly/): https://tinygo.org/docs/reference/usage/subcommands/#build.

Their overview page demonstrators shrinking a binary size by 99% just by instead compiling using the Tiny Go compiler. Certain [Go language features aren't fully supported](https://tinygo.org/docs/reference/lang-support/), so we may need to add some additional build tag layers to make it possible. So far, someone has identified that we'll need to [build tag out the `pprof` import at the very least](https://twitter.com/kiwiidb/status/1492520329352298503?s=20&t=veM7xo8h2ujc8VC_XkygVg).

Read the linked TinyGo WebAssembly guide and language-support list first, then inspect the repository's existing WASM build entry point. Check whether the build can use TinyGo, identify the required build-tag handling for the pprof import, and verify that the resulting WASM blob is smaller and still builds successfully.

Written by the indexing model from the issue text.