Implement the MATERIALIZED and NOT MATERIALIZED hints on common

table expressions.

FossilOrigin-Name: b5a0778cc5a98a864bea72670f83262da940aceb91fa4cdf46ec097337a38a95

diff --cc manifest
index 59fa169b0a0fa61f2d15cf50114e5dc2a1964812,f5608b1d0a0574dad13aefeedd4078520a6af5a2..7cb01ef31bb059c39a0769c45d4f95f4c610f155
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Rename\sthe\s"struct\sSrcList_item"\sobject\sto\sthe\smore\ssuccinct\s"SrcItem".\nThis\sis\sa\ssymbolic\schange\sonly.\s\sThe\slogic\sis\sunmodified.
- D 2021-02-21T21:04:54.414
 -C Add\san\sALWAYS()\son\sa\sbranch\sthat\sis\snow\sunreachable.
 -D 2021-02-22T14:25:40.130
++C Implement\sthe\sMATERIALIZED\sand\sNOT\sMATERIALIZED\shints\son\scommon\ntable\sexpressions.
++D 2021-02-22T16:42:09.548
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -1905,7 -1905,7 +1905,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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+ R 35005ad1dc5275fcaf2f3b302048786b
++T +closed ace54c5bd50176db7c60b7e3cf9293a86d9ecf2fea897467044020b9684c0af3
  U drh
- Z 9a2772a6abeb20b71009a7863f85f821
 -Z 9982ff2e051fdcf6655f0be4d2ebfac0
++Z 8fbd20db3052ba56fcae9ee5726a7d36

diff --cc manifest.uuid
index 08a79a0dbf69f55c9352549e7460e7ab0d4d7fd3,222b39c6f4d90eed18ebd7882fad5290f1ce727f..1b94224fc1f5fecf41c2863aa0c8adc35f51b4f2
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- bfd5bf2c73110fcb36db9ba2a949ff516131fbd3e89325f88fe9f5c2b4ed87b2
 -ace54c5bd50176db7c60b7e3cf9293a86d9ecf2fea897467044020b9684c0af3
++b5a0778cc5a98a864bea72670f83262da940aceb91fa4cdf46ec097337a38a95