[wp] Removes old cache entries and update oracles

src/plugins/wp/tests/wp_acsl/oracle/memvar_chunk_typing.res.oracle

 # frama-c -wp -wp-rte [...]
 [kernel] Parsing tests/wp_acsl/memvar_chunk_typing.i (no preprocessing)
 [wp] Running WP plugin...
-[wp] Loading driver 'share/wp.driver'
 ------------------------------------------------------------
   Global
 ------------------------------------------------------------

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/04c1fcb3dde99404e56f398c9d3c7b31.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.1563,
-  "steps": 286 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/09419c3fbb6dc84c7ea4daf3841c155f.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0323,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/0af3d5135623c7629e8792c15c73e11e.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0323,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/1d2ed0d831c17546d006475b478b59c1.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0322,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/281d06f1268fc1f6bae73c9b23a370f6.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0337,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/35644610983981a71b83b5427a68f6c0.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0377,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/6367c7d1e56f1af80ad76d813e09b66a.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.138,
-  "steps": 269 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/675a842c7ec32528e5e21888634a1279.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0463,
-  "steps": 123 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/7ea33aa4c8dc9c1ed12a312a5a7b96ed.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.1203,
-  "steps": 252 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/a76226839c540aad032cd3b9de095b89.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.1085,
-  "steps": 235 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/bd67f73e3ff115a9f45b4244c20611fe.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0154,
-  "steps": 64 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/e046513e2f30f1a1946d5d6e40ef9129.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0847,
-  "steps": 184 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/e434135b1fa122e6a232e26709df80a5.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0129,
-  "steps": 62 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/e8e066b606c41e89f82b2aa3eef46a68.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0853,
-  "steps": 201 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/e9c784c595bc40819eff858fbcc12bab.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0314,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/efda69b6f9003dcb53f99c442ec8c4de.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0722,
-  "steps": 167 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/f6b163a1cc48d21b279ce315660ffd85.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0881,
-  "steps": 218 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/f97c74763d0222ed9be7c3fa666ce4e9.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0487,
-  "steps": 171 }

src/plugins/wp/tests/wp_acsl/oracle_qualif/chunk_typing.0.session/cache/feca65e917b9c99c3286ceebc5a4d618.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0324,
-  "steps": 171 }