ICU4X collation fails in ICU78 version with several tests

[sven-oly]

Here's the set of test cases that fail:

{"compare_type": "=", "s1": "", "s2": " ", "source_file": "collationtest.txt", "line": 2218, "label": "01253", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "6422f912d2ea7972cbd60b32fde56adf10f2ddde", "test_type": "collation"}
{"compare_type": "=", "s1": " ", "s2": "\n", "source_file": "collationtest.txt", "line": 2219, "label": "01254", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "73a90bc1406ff3976e41f47294685937cf297e81", "test_type": "collation"}
{"compare_type": "=", "s1": "\n", "s2": ".", "source_file": "collationtest.txt", "line": 2220, "label": "01255", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "e18561aa5336d021360d06b46cd455066b260c69", "test_type": "collation"}
{"compare_type": "=", "s1": ".", "s2": "\u00b0", "source_file": "collationtest.txt", "line": 2221, "compare_comment": " degree sign", "label": "01256", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "617f0cfa433de741b9ecab4eeeb1a5c2a35b0609", "test_type": "collation"}
{"compare_type": "=", "s1": "\u00b0", "s2": "$", "source_file": "collationtest.txt", "line": 2222, "label": "01257", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "66785e0b46a095bb818658d282842fc2899252b6", "test_type": "collation"}
{"compare_type": "<1", "s1": "$", "s2": "0", "source_file": "collationtest.txt", "line": 2223, "label": "01258", "locale": "root", "test_description": "maxVariable via setting", "maxVariable": "currency", "alternate": "shifted", "hexhash": "5fc2e7fb60ced7608a648949e89227c786e2c35a", "test_type": "collation"}

[sffc]

unicode-org/icu4x#8075