Miscellaneous EVG compilation script improvements (#1710)

* Fix CCACHE_BASEDIR on Windows distros

* Revert git clone workaround for libmongocrypt

* Use DEBUG configurations by default and make RELEASE opt-in

* Separate source and binary directories

Author: eramongodb

.evergreen/config_generator/components/cse/darwinssl.py

@@ -62,7 +62,6 @@ def tasks():
 def variants():
     expansions = {
         'CLIENT_SIDE_ENCRYPTION': 'on',
-        'DEBUG': 'ON',
     }
 
     return [

.evergreen/config_generator/components/cse/openssl.py

@@ -85,7 +85,6 @@ def tasks():
 def variants():
     expansions = {
         'CLIENT_SIDE_ENCRYPTION': 'on',
-        'DEBUG': 'ON',
     }
 
     return [

.evergreen/config_generator/components/cse/winssl.py

@@ -63,7 +63,6 @@ def tasks():
 def variants():
     expansions = {
         'CLIENT_SIDE_ENCRYPTION': 'on',
-        'DEBUG': 'ON',
     }
 
     return [

.evergreen/config_generator/components/sasl/darwinssl.py

@@ -55,9 +55,7 @@ def tasks():
 
 
 def variants():
-    expansions = {
-        'DEBUG': 'ON'
-    }
+    expansions = {}
 
     return [
         BuildVariant(

.evergreen/config_generator/components/sasl/nossl.py

@@ -58,9 +58,7 @@ def tasks():
 
 
 def variants():
-    expansions = {
-        'DEBUG': 'ON'
-    }
+    expansions = {}
 
     return [
         BuildVariant(

.evergreen/config_generator/components/sasl/openssl.py

@@ -81,9 +81,7 @@ def tasks():
 
 
 def variants():
-    expansions = {
-        'DEBUG': 'ON'
-    }
+    expansions = {}
 
     return [
         BuildVariant(

.evergreen/config_generator/components/sasl/winssl.py

@@ -78,9 +78,7 @@ def tasks():
 
 
 def variants():
-    expansions = {
-        'DEBUG': 'ON'
-    }
+    expansions = {}
 
     return [
         BuildVariant(