Merge branch 'topic/testing' into 'master'

Improve traces and exception messages in testsuite

See merge request eng/ide/ada_language_server!1734

Author: eliericha

gnat/tester.gpr

@@ -27,7 +27,7 @@ project Tester is
    package Compiler renames LSP_Client.Compiler;
 
    package Binder is
-      for Switches ("ada") use ("-E");
+      for Switches ("ada") use ("-Es");
    end Binder;
 
 end Tester;

testsuite/.als/ada_ls_traces.cfg

@@ -1,5 +1,7 @@
 >ada_ls_log.$T.log:buffer_size=0:buffer_size=0
 
+ALS.MAIN=yes
+
 # If you need full input/output from the server uncomment inout.txt lines.
 #>inout.txt:buffer_size=0