Filters for equality don't work with non-primitive/string scope variables

[rbasralian]

Filters for equality (like .where("MyCol = someObject")) don't work for arbitrary datatypes (e.g. java.time.LocalDate, java.awt.Color).

from deephaven import empty_table
from deephaven.time import to_j_local_date
import jpy
BLACK = jpy.get_type('java.awt.Color').BLACK
colors = empty_table(1000).update("Color = new java.awt.Color(i%255, i*2 % 255, i*i % 255)")
colors_filtered_works = colors.where("Color = java.awt.Color.BLACK")
colors_filtered_broken = colors.where("Color = BLACK")

Throws:

RuntimeError: java.lang.IllegalArgumentException: Unknown type java.awt.Color for MatchFilter value auto-conversion
	at io.deephaven.engine.table.impl.select.MatchFilter$ColumnTypeConvertorFactory.getConvertor(MatchFilter.java:501)
	at io.deephaven.engine.table.impl.select.MatchFilter.init(MatchFilter.java:183)
	at io.deephaven.engine.table.impl.QueryTable.initializeAndPrioritizeFilters(QueryTable.java:1175)
	at io.deephaven.engine.table.impl.QueryTable.lambda$whereInternal$29(QueryTable.java:1225)
	at io.deephaven.engine.table.impl.perf.QueryPerformanceRecorder.withNugget(QueryPerformanceRecorder.java:369)
	at io.deephaven.engine.table.impl.QueryTable.whereInternal(QueryTable.java:1223)
	at io.deephaven.engine.table.impl.QueryTable.where(QueryTable.java:1162)
	at io.deephaven.engine.table.impl.QueryTable.where(QueryTable.java:100)
	at org.jpy.PyLib.executeCode(Native Method)
	at org.jpy.PyObject.executeCode(PyObject.java:138)
	at io.deephaven.engine.util.PythonEvaluatorJpy.evalScript(PythonEvaluatorJpy.java:73)
	at io.deephaven.integrations.python.PythonDeephavenSession.lambda$evaluate$1(PythonDeephavenSession.java:205)
	at io.deephaven.util.locks.FunctionalLock.doLockedInterruptibly(FunctionalLock.java:51)
	at io.deephaven.integrations.python.PythonDeephavenSession.evaluate(PythonDeephavenSession.java:205)
	at io.deephaven.engine.util.AbstractScriptSession.lambda$evaluateScript$0(AbstractScriptSession.java:163)
	at io.deephaven.engine.context.ExecutionContext.lambda$apply$0(ExecutionContext.java:196)
	at io.deephaven.engine.context.ExecutionContext.apply(ExecutionContext.java:207)
	at io.deephaven.engine.context.ExecutionContext.apply(ExecutionContext.java:195)
	at io.deephaven.engine.util.AbstractScriptSession.evaluateScript(AbstractScriptSession.java:163)
	at io.deephaven.engine.util.DelegatingScriptSession.evaluateScript(DelegatingScriptSession.java:72)
	at io.deephaven.engine.util.ScriptSession.evaluateScript(ScriptSession.java:75)
	at io.deephaven.server.console.ConsoleServiceGrpcImpl.lambda$executeCommand$4(ConsoleServiceGrpcImpl.java:191)
	at io.deephaven.server.session.SessionState$ExportBuilder.lambda$submit$2(SessionState.java:1537)

Same thing for LocalDate:

from deephaven import empty_table
from deephaven.time import to_j_local_date
x = empty_table(1_000).update(["Date = '2024-06-07'"])
my_date = to_j_local_date("2024-06-06")
filter1 = x.where("Date=my_date")
filter2 = x.where("Date='2024-06-06'") # same exception

RuntimeError: java.lang.IllegalArgumentException: Unknown type java.time.LocalDate for MatchFilter value auto-conversion
	at io.deephaven.engine.table.impl.select.MatchFilter$ColumnTypeConvertorFactory.getConvertor(MatchFilter.java:501)
	at io.deephaven.engine.table.impl.select.MatchFilter.init(MatchFilter.java:183)