postgres_ffi/wal_generate: use 'craft' instead of 'generate'

It does very fine-tuned byte-to-byte WAL crafting, not a sloppy generation.
Hence 'craft' sounds like a better description.

test_runner/batch_others/test_crafted_wal_end.py

@@ -1,4 +1,4 @@
-from fixtures.neon_fixtures import NeonEnvBuilder, WalGenerate
+from fixtures.neon_fixtures import NeonEnvBuilder, WalCraft
 from fixtures.log_helper import log
 import pytest
 
@@ -20,8 +20,8 @@ def test_crafted_wal_end(neon_env_builder: NeonEnvBuilder, wal_type: str):
     env.neon_cli.create_branch('test_crafted_wal_end')
 
     pg = env.postgres.create('test_crafted_wal_end')
-    gen = WalGenerate(env)
-    pg.config(gen.postgres_config())
+    wal_craft = WalCraft(env)
+    pg.config(wal_craft.postgres_config())
     pg.start()
     res = pg.safe_psql_many(queries=[
         'CREATE TABLE keys(key int primary key)',
@@ -30,7 +30,7 @@ def test_crafted_wal_end(neon_env_builder: NeonEnvBuilder, wal_type: str):
     ])
     assert res[-1][0] == (5050, )
 
-    gen.in_existing(wal_type, pg.connstr())
+    wal_craft.in_existing(wal_type, pg.connstr())
 
     log.info("Restarting all safekeepers and pageservers")
     env.pageserver.stop()

test_runner/fixtures/neon_fixtures.py

@@ -1263,13 +1263,13 @@ class NeonCli(AbstractNeonCli):
         return self.raw_cli(args, check_return_code=check_return_code)
 
 
-class WalGenerate(AbstractNeonCli):
+class WalCraft(AbstractNeonCli):
     """
-    A typed wrapper around the `wal_generate` CLI tool.
+    A typed wrapper around the `wal_craft` CLI tool.
     Supports main commands via typed methods and a way to run arbitrary command directly via CLI.
     """
 
-    COMMAND = 'wal_generate'
+    COMMAND = 'wal_craft'
 
     def postgres_config(self) -> List[str]:
         res = self.raw_cli(["print-postgres-config"])