- Remove ByteLength from base32 API
- Describe the difference between decode/encode and parse/stringify
- Remove utf8 file

Instead of relying on "serde_v8" which is very inefficient in
serializing enums, I'm hand rolling serde for "ModuleMap" data 
that is stored in the V8 snapshot to make ES modules 
snapshottable.

```
// this branch
Benchmark #2: ./target/release/deno run empty.js

  Time (mean ± σ):      21.4 ms ±   0.9 ms    [User: 15.6 ms, System: 6.4 ms]

  Range (min … max):    20.2 ms …  24.4 ms

// main branch
Benchmark #2: ./target/release/deno run empty.js

  Time (mean ± σ):      23.1 ms ±   1.2 ms    [User: 17.0 ms, System: 6.2 ms]

  Range (min … max):    21.0 ms …  26.0 ms

```

#30019)

…9515)"

This reverts commit 248d038.

Reverting for now as it causes programs to not exit properly, see
#29590.

While we are working on a proper fix it's better to revert it
and not flush OTEL data in some situations.

## Summary

This reduces startup snapshot deserialization overhead from native
callback function shapes.

The stack does three things:

- creates native accessor callbacks with `ConstructorBehavior::Throw`,
avoiding useless accessor `.prototype` graphs
- uses direct V8 functions for snapshotted top-level ops instead of
FunctionTemplates by default
- adds an explicit `#[op2(constructable)]` opt-in for top-level ops that
must preserve a public JS function prototype/constructor shape

## Snapshot Size

Measured with debug builds:

```sh
deno run --v8-flags=--profile-deserialization empty.js
```

Summing the three `Deserializing ... (N bytes)` rows, excluding the
final `Serializing to ...` row:

| build | total deserialized bytes | delta |
| --- | ---: | ---: |
| `main@upstream` | 4,768,928 | - |
| this PR | 4,466,352 | -302,576 bytes |

That is a 6.34% reduction in the deserialized snapshot byte total for
this measurement.

Breakdown:

| section | `main@upstream` | this PR | delta |
| --- | ---: | ---: | ---: |
| read-only space | 991,144 | 991,144 | 0 |
| isolate | 2,561,136 | 2,518,976 | -42,160 |
| context #2 | 1,216,648 | 956,232 | -260,416 |

Saved local binaries used for the comparison:

- `/tmp/deno-accessor-snapshot-binaries/deno-baseline-main-upstream`
-
`/tmp/deno-accessor-snapshot-binaries/deno-current-constructable-stack`

## Validation

```sh
cargo test -p deno_core_testing resource_test
cargo test -p deno_ops op2::tests
cargo check -p deno_core -p deno_core_testing -p deno_ops
```