feat(server): search unknown place (#10866)

* Allow submission of null country

* Update searchAssetBuilder to handle nulls

andWhere({country:null}) produces `"exifInfo"."country" = NULL`. We want
`"exifInfo"."country" IS NULL`, so we have to treat NULL as a special
case

* Allow null country in frontend

* Make the query code a bit more straightforward

* Remove unused brackets import

* Remove log message

* Don't change whitespace for no reason

* Fix prettier style issue

* Update search.dto.ts validators per @jrasm91's recommendation

* Update api types

* Combine null country and state into one guard clause

* chore: clean up

* chore: add e2e for null/empty city, state, country search

* refactor: server returns suggestion for null values

* chore: clean up

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>
Co-authored-by: Jason Rasmussen <jason@rasm.me>

open-api/immich-openapi-specs.json

@@ -4727,6 +4727,15 @@
               "type": "string"
             }
           },
+          {
+            "name": "includeNull",
+            "required": false,
+            "in": "query",
+            "description": "This property was added in v111.0.0",
+            "schema": {
+              "type": "boolean"
+            }
+          },
           {
             "name": "make",
             "required": false,
@@ -9378,9 +9387,11 @@
             "type": "string"
           },
           "city": {
+            "nullable": true,
             "type": "string"
           },
           "country": {
+            "nullable": true,
             "type": "string"
           },
           "createdAfter": {
@@ -9426,6 +9437,7 @@
             "type": "boolean"
           },
           "lensModel": {
+            "nullable": true,
             "type": "string"
           },
           "libraryId": {
@@ -9437,6 +9449,7 @@
             "type": "string"
           },
           "model": {
+            "nullable": true,
             "type": "string"
           },
           "order": {
@@ -9468,6 +9481,7 @@
             "type": "number"
           },
           "state": {
+            "nullable": true,
             "type": "string"
           },
           "takenAfter": {
@@ -10611,9 +10625,11 @@
       "SmartSearchDto": {
         "properties": {
           "city": {
+            "nullable": true,
             "type": "string"
           },
           "country": {
+            "nullable": true,
             "type": "string"
           },
           "createdAfter": {
@@ -10649,6 +10665,7 @@
             "type": "boolean"
           },
           "lensModel": {
+            "nullable": true,
             "type": "string"
           },
           "libraryId": {
@@ -10660,6 +10677,7 @@
             "type": "string"
           },
           "model": {
+            "nullable": true,
             "type": "string"
           },
           "page": {
@@ -10682,6 +10700,7 @@
             "type": "number"
           },
           "state": {
+            "nullable": true,
             "type": "string"
           },
           "takenAfter": {