update mocking for Databricks config tests

[simonpcouch]

We missed this in #857, but there are a few local_mocked_bindings() that needed updating that are now showing failures on main:

══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-driver-databricks.R:98:3'): dbConnect method handles httpPath aliases (#787) ──
Error in `local_mocked_bindings(databricks_args = function(...) stop("made it"), 
    configure_spark = function(...) TRUE)`: Can't find binding for `configure_spark`
Backtrace:
    ▆
 1. └─testthat::local_mocked_bindings(databricks_args = function(...) stop("made it"), configure_spark = function(...) TRUE) at test-driver-databricks.R:98:3
 2.   └─cli::cli_abort("Can't find binding for {.arg {missing}}")
 3.     └─rlang::abort(...)
── Error ('test-driver-databricks.R:108:3'): dbConnect method errors informatively re: httpPath (#787) ──
Error in `local_mocked_bindings(configure_spark = function(...) TRUE)`: Can't find binding for `configure_spark`
Backtrace:
    ▆
 1. └─testthat::local_mocked_bindings(configure_spark = function(...) TRUE) at test-driver-databricks.R:108:3
 2.   └─cli::cli_abort("Can't find binding for {.arg {missing}}")
 3.     └─rlang::abort(...)
── Error ('test-utils.R:157:3'): configure_simba() calls configure_unixodbc_simba() (#835) ──
Error in `local_mocked_bindings(locate_install_unixodbc = function() "hey", 
    locate_config_spark = function() "there", configure_unixodbc_simba = function(...) TRUE)`: Can't find binding for `locate_config_spark`
Backtrace:
    ▆
 1. └─testthat::local_mocked_bindings(...) at test-utils.R:157:3
 2.   └─cli::cli_abort("Can't find binding for {.arg {missing}}")
 3.     └─rlang::abort(...)